Steve Hall, a former Scientologist who left the church in 2004 after spending the previous 17 years at its international management level as a senior writer of its marketing materials, spoke to Business Insider recently about where Shelly Miscavige might be. He believes Shelly is at Scientology's little-known "Church of Spiritual Technology," a remote forest compound with prison-like security in Twin Peaks, Calif., near San Bernadino.

By 2006, one of those abruptly 'disappeared' from the RTC, and from Int, would be Miscavige's wife, Shelly, who was reportedly exiled to a Church of Scientology compound near Big Bear, California.

Big Bear is near San Bernadino.

Hall, however, said Shelly's exile at the CST compound may be voluntary — he says he spent years as a virtual and actual prisoner of the church, at a different site. Even after his periods of physical incarceration ended, he said, he continued to work for Miscavige because he believed in the religion.

Is Shelly being held against her will? "Yes and no," Hall says, "nobody wants to be held. … the answer is the Stockholm Syndrome."

One person who has visited the compound is "Angry Gay Pope," the nom de guerre of an Anonymous activist who has staged protests against Scientology. In 2010 he took these pictures of the CST compound in Twin peaks, Calif., documenting its spiked fences, razor wire, motion detectors, infra-red spotlights, satellite dishes, fuel tanks and mysterious semi-permanent trailers.

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This is an aerial view of the Twin Peaks, Calif., property owned by Scientology.

Google Earth

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This aerial view has notations by Angry Gay Pope. The official address of the compound is 25406 State Highway 189, Twin Peaks, CA 92391.

Google Street View

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This is an entrance to the compound, showing a security gate.

Google Street View

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This was the woman at Twin Peaks' security on the day Angry Gay Pope came to take photos. Doesn't look too threatening, does she? But ...

The Scientologists documented AGP's every move. This remote controlled camera is equipped with an infra-red spotlight to illuminate intruders at night.

Here's another one. Smile!

These floodlights are triggered by motion detectors.

At the back of the property, away from the road, the less distinctive Ultra-Barrier is replaced by concertina razor wire. AGP's ex-Scientology sources claim this building houses an elevator that leads to a vault containing Scientology's most important texts.